Upper Letts Lake Weather Forecast

    • 44
    • 48

    Mostly Cloudy

    • 40
    • 47

    Rain

    • 41
    • 45

    Rain

    • 36
    • 45

    Rain

    • 37
    • 39

    Rain/Snow

    • 37
    • 39

    Rain/Snow Likely

    • 37
    • 40

    Rain/Snow Likely

Today 30 Dec Mountains Southwestern Shasta County to Western Colusa County

Sunny. Highs 47 to 59. Light Winds.

Tonight 30 Dec Mountains Southwestern Shasta County to Western Colusa County

Mostly cloudy. Lows 39 to 47. Prevailing northwest Winds up to 10 Mph.

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Upper Letts Lake Temperature Statistics

December Temperature

Ukiah Municipal Airport (28.6 miles)

  • Lowest 13 December, 2025

    30 °F

  • Average December

    49.2 °F

  • Highest 10 December, 2025

    72 °F

Climate (2020–Present)

Ukiah Municipal Airport (28.6 miles)

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  • Average Low 2020–2025

    47.1 °F

  • Average 2020–2025

    60.8 °F

  • Average High 2020–2025

    76 °F
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